1. The appearance identification method generally has a large head, a narrow nostril, a line of mouth along the mouth, a round body, a pointed duck with a small head, a relatively small round nostril, a flat body, and a loose duck with a tail. 2. The sonic tube, also known as the lower throat, is located at the top of the trachea bifurcation. The drake here has an enlarged spherical tympanum with a diameter of 3--4 mm. It can be grasped from the chest outside the body and the duck does not whisper. 3. Touch the anal discriminating method left hand to support the newborn ducklings, making it back to the sky, belly down, with the thumb and forefinger lightly clip the neck, with your right thumb and index finger gently flat under the anus, first forward press, with If you feel backwards, if you feel that there is something protruding from the size of its granules or rapeseed, it is a male duckling, otherwise it is a female duckling. 4. The anal veritometry method holds the newborn ducklings in the left hand, gripping the neck of the duck with the middle finger and ring finger, head outwards, belly up, and become supine. Then use the right thumb and forefinger to separate the feces around the anus to squeeze out the meconium, gently open the anus and allow it to eversion. Ducks can see about 4 mm of protuberances (penis) in the ducklings, while the mother ducks have no or only residual marks.
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